adumbrate vs block out

adumbrate and block out both are verbs.

Word	Noun	Adjective	Verb	Adverb
adumbrate	No	No	Yes	No
block out	No	No	Yes	No

As verbs, block out is a hyponym of adumbrate; that is, block out is a word with a more specific, narrower meaning than adumbrate:

adumbrate: describe roughly or briefly or give the main points or summary of
block out: indicate roughly

Other hyponyms of adumbrate include sketch out.

adumbrate (verb)	block out (verb)
describe roughly or briefly or give the main points or summary of	plan where and when songs should be inserted into a theatrical production, or plan a theatrical production in general
give to understand	indicate roughly
	shield from light
	prevent from entering